Service difficulty report · Shield · Boeing 7378H4

Difficulty date
May 17, 2022
Submitted
June 13, 2022
Operation
Air carrier
Aircraft
N8690A
Make and model
Boeing 7378H4
Aircraft serial
36916
Aircraft time
20,154 hours, 9,318 cycles
Part
Shield
Part number
143A812638
Condition
Corroded
Location
Fwd Cargo Bay
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FWD CARGO COMPARTMENT FLOOR AREA STA 500 TO STA 500A; RBL 24; WL 156; SHIELD IS CORRODED. A177-009 / [01] REMOVED CORROSION ON Z ANGLE IAW SRM 51-10-02-0G-0 ITEM 15;[02] EVALUATED ALLOWABLE LIMITS. 040 ORIGINAL 'T' .031 REMAINING .009 LOSS; FOUND OUT OF LIMITS IAW SRM 53-00-53-1A-2 TOOL USED AAR UT # 36644 DUE 08/20/22;[03] VERIFIED STEPS 1 AND 2 ARE COMPLETE;[04] VERIFIED STEPS 1; 2 AND 3 FOUND TO BE OUT OF LIMITS;[05] RE-ERVALUATED MEASUREMENT LIMITS FOR STEP 2 PER SRM 53-30-15-0I-1 AND DRAWING 143A8126 SHIELD ORIGINAL THICKNESS SHOULD BE .032 MATERIAL LOSS WOULD BE .001 WITH .031 REMAINING MAKING PART WITHIN LIMITS IAW 53-00-53-1A-2;[06] VERIFIED MEASURMENT CHART;[07] VERIFIED STEPS 5 AND 6;[08] OK GIVEN TO TREAT AND PRIME;[09] APPLIED ALODINE AND PRIME IAW SRM 51-20-01-0G-0 AND AMM51-21-72-370-804;[10] VERIFIED STEP 9;[11] OK TO CIC;[12] APPLIED CIC IAW AMM 51-21-91-620-802;[13] ALL WORK C/W<BR>AUDIT C/W

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